17+x=21

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Solution for 17+x=21 equation: 


Simplifying
17 + x = 21

Solving
17 + x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-17' to each side of the equation.
17 + -17 + x = 21 + -17

Combine like terms: 17 + -17 = 0
0 + x = 21 + -17
x = 21 + -17

Combine like terms: 21 + -17 = 4
x = 4

Simplifying
x = 4

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